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بررسی ارتباط بین شرایط بدنی و شیر روزانه با بروز ورم پستان در گاوهای شیری

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشکدۀ کشاورزی، دانشگاه زنجان

2 دانشیار، دانشکدۀ کشاورزی، دانشگاه زنجان

3 دانشیار، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

چکیده

این پژوهش با هدف ارزیابی امتیاز شرایط بدنی (BCS) در هنگام زایش و نیز رکورد روز آزمون چربی و پروتئین شیر در دو هفتۀ اول پس از زایش با بروز ورم پستان بالینی و زیر بالینی اجرا شد. 117 رأس گاو پس از زایش به دو گروه گاو چاق و عادی تقسیم شدند و نمونه‌های شیر از آن‌ها در دو هفتۀ اول پس از زایش گرفته شد. نتایج نشان داد، BCSزایش با سلامت پستان ارتباط نداشت. پروتئین و چربی شیر ارتباط معنی‌داری با سلامت پستان در هفتۀ اول و دوم پس از زایش داشتند. اما ارتباط معنی‌داری بین نسبت چربی به پروتئین با التهاب پستان در هیچیک از هفته‌ها وجود نداشت. لذاBCS  زایش و نسبت چربی به پروتئین سنجه‌های قابل‌اطمینان برای بروز ورم پستان بالینی و زیر بالینی نیستند؛ ولی درصد چربی شیر و پروتئین شیر در هفته‌های اول و دوم پس از زایش می‌توانند ملاک مناسبی برای پیش‌بینی بروز ورم پستان تحت بالینی در اوایل دورۀ شیردهی گاوها باشند.

کلیدواژه‌ها


عنوان مقاله [English]

Relationship between body condition and milk test with mastitis prevalence of dairy cows at early lactation

نویسندگان [English]

  • Morteza Mansooryar 1
  • Hamidreza Mirzaei Alamouti 2
  • Mehdi Dehghan-Banadaky 3
1 Ph.D. Student, Department of Animal Science, University of Zanjan, Iran
2 Associate Professor, Department of Animal Science, University of Zanjan, Iran
3 Associate Professor, Department of Animal Science, University College of Agriculture & Natrual Resources, University of Tehran, Karaj, Iran
چکیده [English]

This study was conducted to evaluate the relationship between calving body condition score (BCS) as well as first and second milk test postpartum with clinical and subclinical mastitis prevalence. After calving 117 multiparous cows were divided to two groups based on their BCS as fat and normal conditioned and milk samples were taken in week one and two postpartum. The results showed BCS at calving time had no significant relationships with udder health. Milk protein and fat had significant associations with udder health in week 1 and 2 postpartum; however in none of weeks no meaningful relationships were found between milk fat to protein ratio with udder inflammation. Therefore, calving BCS and fat to protein ratio are not reliable markers for clinical or subclinical mastitis incidence; however milk fat and protein in week 1 and 2 postpartum can be used as proper markers for predicting subclinical mastitis in dairy cows at early lactation.

کلیدواژه‌ها [English]

  • BCS
  • fat
  • Mastitis
  • protein
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